JPH0643242Y2 - Manhole cover connecting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a manhole cover connecting device for connecting a manhole cover to a cylindrical receiving frame buried in the ground so that the cover can be opened and closed by a connecting tool. Is.

(Prior Art) The applicant of the present invention has previously developed a connecting device for a manhole cover (Shokaisho 61-155440) as shown in FIGS. 11 to 13. As shown in FIG. 11, the manhole cover A is turned upside down, and the connector 4 is moved in the direction of the arrow so that the support portion 2 of the connector 4 is closed.
The supporting pieces D and E are inserted into the supporting holes F and G, and then the lid A is turned upside down to fit into the receiving frame H buried in the ground as shown in FIG. At the same time, the locking protrusion I of the connector 4 is inserted into the holding port K of the retaining portion J of the receiving frame H so that the locking protrusion I does not come off from the holding port K. The lid A is connected to the receiving frame H by means of the above, and the lid A can be rotated by 180 degrees about the support portion 2 from the closed state in FIG. 12 to the inverted state in FIG.

(Problems to be Solved by the Invention) The above-described conventional manhole cover connecting device has the following problems.

(1) Insert the insertion portion L of the connector 4 into the support piece D as shown in FIG.
However, if the opening M is made too wide, the connector 4 will easily pass through, but it will also easily come off, and will be handled roughly when the manhole cover is unloaded on a truck. Therefore, the connector 4 may come off from the opening M. The same thing happened when the lid of a manhole leaning against a wall fell.

(2) If the opening M is narrowed in order to prevent the connector 4 from coming off, if there is some error in the dimensional accuracy of the connector 4 and the support piece F, or if there is a burr, the insertion portion L will have an opening M. It may be difficult or impossible to enter. In particular, since the connector 4 and the supporting piece F are generally made of cast metal, it is difficult to obtain dimensional accuracy and burr easily occurs, and this problem often occurs.

(3) If the insertion portion L of the connector 4 is made thin so as to easily pass through the opening M, the strength of the connector 4 becomes weak.

(4) When the insertion portion L does not enter the opening M, the workability is poor because the burr must be manually trimmed and repaired or remade. This problem is particularly problematic in mass production and also increases cost.

(5) There is a serious problem that it takes time to repair or remake, so that it cannot be in time for the urgent delivery.

(Purpose of the Invention) The purpose of the present invention is to attach the connector to the lid even if there are some dimensional errors and burrs, and the connector is hard to come off, and the manhole has excellent mechanical strength. The object is to provide a lid connecting device.

(Means for Solving the Problem) As shown in FIG. 1, a connecting device for a manhole cover according to the present invention includes a retaining portion J projecting inward from a receiving frame H into which a manhole cover A is fitted. A connector in which a supporting portion 2 is formed at one end of the arm 1 inserted into the retaining portion J so as to project to both sides thereof, and a locking portion 3 is also formed at the other end thereof so as to project to both sides thereof. 4, a storage portion 5 formed on the back surface N of the manhole cover A so as to store the support portion 2 as shown in FIGS. 7 to 10, and a storage portion 5 for receiving the storage portion 5 as shown in FIG. A stopper that is housed and fixed near the rear of the projecting portion 11 of the supporting portion 2 housed in the receiving portion 9 in the housing direction in the portion 9 and restricts the detachment of the supporting portion 2 from the receiving portion 9. It is composed of a tool 6 and a storage unit 5 with a lid A as shown in FIG.
Set that is elongated from the outer peripheral side toward the center side, has a length in the longitudinal direction that is shorter than the length of the support portion 2 and a width that is shorter than the length of the support portion 2, and opens on the opposite side of the back surface N of the lid A to the outside. A part 21 is formed, a peripheral frame 22 is formed on the outer periphery of the setting part 21 as shown in FIG. 3, and the receiving part 9 is formed in one side wall 23 of the peripheral frame 22. Is formed so as to be elongated along the set portion 21 and open to the set portion 21 so that the stopper 6 and one of the protruding portions 11 of the support portion 2 can be housed therein. A stop hole 13 is formed therethrough, and the other side wall 24 of the peripheral frame 22 facing the side wall 23 is formed.
As shown in FIG. 9 and FIG.
The projecting part insertion hole 7 that can insert 10 is the set part
It is formed so as to open at 21, and the stopper 6 is sized so as to be accommodated in the receiving portion 9 as shown in FIG. 10. The stopper 6 has two protruding portions as shown in FIG. 6a and 6b are formed and a screw insertion concave portion 6d is formed between the both projecting portions 6a and 6b, and the screw insertion concave portion 6d has a set screw 14 as shown in FIG.
The head 15 or the nut that is screwed into the set screw 14 is inserted, but the head 15 or the nut is formed with a width that cannot rotate, and the screw insertion recess 6d has a screw insertion hole 6c that penetrates to the outside.
Are formed.

(Operation of the Invention) To connect the manhole cover A to the receiving frame H as shown in FIG. 1 using the manhole cover connecting device of the present invention, the following steps are performed.

First, as shown in FIG. 7, the lid A is turned upside down, the connector 4 is turned sideways, and the supporting portion 2 is inserted (set) in the setting portion 21 of the storage portion 5.

Next, by rotating the arm 1 of the connector 4 in the direction of arrow a as shown in FIG. 8A, the support portion 2 is rotated in the same direction as shown in FIG. Insert the protruding portion 10 into the protruding portion insertion hole 7, and insert the protruding portion 10 into the other protruding portion of the supporting portion 2.
Insert 11 into receiving part 9.

In this state, the stopper 6 is pushed into the receiving portion 9 from the setting portion 21 of the storage portion 5 as shown in FIG.
Insertion hole 6c of screw insertion recess 6d of stopper 6 shown in (b)
To the side wall 23 of the receiving portion 9 from the stop hole 13 (fifth
(Fig. 1) Insert the set screw 14 as shown in Fig. 1, screw the nut into the end of the set screw 14 that penetrates the set hole 13 and projects to the outside, and rotate the nut to set the set screw 14. Tighten and fix. In this case, as shown in Fig. 1, the head of the set screw 14
By setting 15 in the screw insertion recess 6d of the stopper 6, the head 15 of the set screw 14 in the screw insertion recess 6d does not rotate even when the nut is rotated. The set screw 14 does not run idle without fixing with a tool. Therefore, the work of tightening the nut screwed into the set screw 14 becomes very easy. Further, since the stopper 6 is arranged and fixed near the supporting portion 2 in the receiving portion 9, the arm 1
The support portion 2 hits the stopper 6 and does not move in the direction of arrow y in FIG.

In this state, the lid A is turned upside down and the lid A is first
As shown in the figure, the fitting portion 3 is fitted into the receiving frame H, and the locking portion 3 of the connector 4 is inserted into the holding port K of the retaining portion J attached to the receiving frame H, so that the locking portion 3 does not come off from the holding port K. To do so. In this case, the locking portion 3 is inserted into the holding port K in parallel with the long side of the holding port K shown in FIG.
The locking portion 3 is rotated by 90 ° by rotating it by 90 °. As a result, the locking portion 3 becomes orthogonal to the short side of the holding opening K, and the locking portion 3 does not come off from the holding opening K. Moreover, the lid A is changed from the closed state shown in FIG.
It is possible to rotate 180 degrees around the axis.

(Example) In FIG. 1, A is a manhole cover, H is a receiving frame for covering the manhole cover A, and 4 is a connector for connecting the manhole cover A and the receiving frame H.

As shown in FIGS. 1 and 7, the connector 4 is an arm 1
The support portion 2 formed at one end in the longitudinal direction and the locking portion 3 formed at the other end are integrally formed. The support portion 2 and the locking portion 3 are provided on both sides of the arm 1 so as to project. In FIG. 10, reference numeral 10 is one protrusion of the support portion 2, and 11 is the other protrusion portion of the support portion 2.

Reference numeral 5 in FIGS. 3 to 10 denotes a storage portion, which is formed on the back surface of the lid A of the manhole and is used for attaching the connector 4 to the lid A.

A set portion 21 is formed in the storage portion 5. The set portion 21 is elongated from the outer peripheral side to the center side of the lid A, and the length in the longitudinal direction thereof is longer than the length of the support portion 2 and shorter than the length of the support portion 2 as shown in FIG. The side opposite to the back surface N of the lid A is formed so as to open to the outside.

A peripheral frame 22 is formed on the outer periphery of the setting portion 21. A receiving portion 9 is formed in one side wall 23 of the peripheral frame 22. The receiving portion 9 is formed along the setting portion 21 so as to be elongated and open to the setting portion 21, and as shown in FIGS. 9 and 10, the stopper 6 and one protruding portion 11 of the support portion 2 are formed. Can be stored.

A protrusion insertion hole 7 is formed in the other side wall 24 of the peripheral frame 22 that faces the peripheral wall 23. The protruding portion insertion hole 7 is formed so as to open to the setting portion 21, and the other protruding portion 10 of the support portion 2 can be inserted therein as shown in FIGS. 9 and 10.

The stopper 6 is a receiving portion 9 of the storage portion 5 as shown in FIG.
It is formed in such a size that it can be stored inside, and in addition, Fig. 8
As described above, the screw insertion recess 6d is formed between the two protrusions 6a and 6b, and the screw insertion hole 6c is formed through the screw insertion recess 6d. This screw insertion recess 6d is the head 15 of the set screw 14.
Alternatively, the nut that is screwed into the set screw 14 is inserted, but the head 15 or the nut is formed with a width that cannot rotate. With this structure, the set screw 14 is inserted into the screw insertion hole 6c as shown in FIG. 1, and the set screw 14 is received in the receiving portion 9 shown in FIG.
Insert into the stop hole 13 formed in the side wall 23 of the
A nut is screwed onto the tip of the set screw 14 protruding outward from the stop hole 13, and the nut 6 is tightened to fix the stopper 6
Are fixed in the receiving portion 9. In this case, the first
When the head 15 of the set screw 14 is set in the screw insertion recess 6d of the stopper 6 as shown in the figure, the head 15 of the set screw 14 in the screw insertion recess 6d does not rotate even if the nut is tightened. Even if it is not pressed with a tool such as a spanner, the setscrew 14 will not rotate idly, and the work of tightening the nut screwed onto the setscrew 14 will be easy.

In this embodiment, contrary to the above case, the set screw 14 is attached to the side wall 23.
From the outside of the screw hole 13 into the stopper hole 13 to penetrate the screw insertion hole 6c of the stopper 6 inside, and the nut is screwed to the tip of the set screw 14 protruding inward from the screw insertion hole 6c. May be set in the screw insertion recess 6d of the stopper 6, and in this state, the head of the set screw 14 protruding outside the stop hole 13 may be tightened with a tool. Also in this case the screw insertion recess
Since the nut set in 6d does not rotate, it is not necessary to press the nut with a tool, and the set screw 14 can be tightened easily.

In this case, as shown in FIG. 1, the set screw 14 for mounting the stop 6 in the receiving portion 9 is located above the base portion 1a of the arm 1, so that the arm A is pushed up even if the lid A is pushed up by the gust of wind blowing from inside the manhole. The root portion 1a of 1 hits the set screw 14 and the lid A is not pushed up so much.
That is, the set screw 14 can prevent the lid A from being pushed up.

J in FIG. 1 is a retaining portion, which is provided so as to project inside the receiving frame H, and its shape is formed into an elongated frame shape as shown in FIG. 2, and its width is shown in FIG. As shown, the length is shorter than the total length of both locking portions 3 of the connecting tool 4, and the depth is longer than the total length of the locking portions 3. As a result, when the locking portion 3 is oriented in the longitudinal direction of the retaining portion J as shown in FIG.
It can be inserted into or withdrawn from the holding port K of, and when the locking portion 3 is rotated 90 ° to change the direction, the locking portion 3
Is not prevented from coming out of the holding port K.

When the retaining portion J greatly protrudes inside the receiving frame H,
Since it is inconvenient for people to enter and leave the manhole, it is preferable that the retaining portion J does not protrude inward as much as possible.

(Effect of Device) The manhole cover connecting device of the present invention has the following effects.

(1) When the support part 2 of the connector 4 is housed in the set part 21 of the storage part 5 and then the connector 4 is rotated to make the support part 2 sideways, the receiving part 9 of the storage part 5 and the insertion hole. The support part 2 of the connector 4 can be set between the support part 2 and the connector 7. Further, if the connector 4 is reversely rotated from that state, the support part 2 of the connector 4 can be removed from between the receiving part 9 of the storage part 5 and the insertion hole 7, and thus the connector to the storage part 5 can be removed. Installation of the support part 2 of 4,
Easy to remove.

(2) Since the side of the setting portion 21 opposite to the back surface N of the lid A is open to the outside, the support portion 2 of the connector 4 can be inserted into the setting portion 21 from the opening and set, or the opening portion It can be taken out from. Therefore, it is easy to set and remove the support part 2 from the set part 21.

(3) Since the setting part 21 of the storage part 5 is surrounded by the peripheral frame 22, the strength of the storage part 5 is strong. In addition, since the support portion 2 stored in the storage portion 5 is surrounded by the peripheral frame 22, it becomes difficult for an external force to be applied to the support portion 2. For this reason, even if the manhole cover A is roughly handled during loading or unloading on a truck, or if the manhole cover A leaning against a wall falls down, a shock is directly applied to the support portion 2. Since it does not exist, the support portion 2 does not break or come off from the storage portion 5.

(4) Since the storage part 5 is surrounded by the peripheral frame 22, the molten metal easily flows when the lid A is cast, and the dimensional accuracy is improved, so that the storage part 5 with high accuracy is formed.

(5) Since the stopper 6 is securely fixed to the peripheral wall 23 of the peripheral frame 22 having a high strength by the set screw 14, the manhole cover A can be loaded or unloaded on a truck, handled roughly during construction, or leaned against the wall. Even if the cover A of the existing manhole falls down, even if an external force or impact is transmitted from the arm 1 to the support portion 2 and applied to the stopper 6, the load on the set screw 14 is reduced, and the set screw 14 is It hardly breaks.

(6) As shown in FIG. 10, one protrusion 10 of the support portion 2 is inserted into the insertion hole 7, the other protrusion 11 of the support portion 2 is inserted into the receiving portion 9, and then the stopper is attached as shown in FIG. Since 6 is mounted in the receiving portion 9, even if the dimensional accuracy of the supporting portion 2, the receiving portion 9 of the accommodating portion 5 and the insertion hole 7 is slightly different, the supporting portion 2
Can be reliably stored in the storage section 5.

(7) Since the stopper 6 is arranged and fixed in the receiving portion 9 near the rear of the projecting portion 11 of the supporting portion 2 in the storage direction, the support portion 2 moves in the longitudinal direction of the receiving portion 9 (storage direction). Is restricted by the stopper 6, so that the support portion 2 does not move in the storage direction inside the receiving portion 9 and rattle, and does not come off from the receiving portion 9.

(8) Even if the base portion 1a (FIG. 1) of the support portion 2 of the connector 4 is not thinned, the support portion 2 enters the setting portion 21 of the storage portion 5,
Moreover, since the root portion 1a does not get in the way when the support portion 2 is rotated and set between the receiving portion 9 and the insertion hole 7, the root portion 1a can be thickened to form the connector 4 having excellent strength. it can.

(9) A screw insertion recess 6d is provided between the two protrusions 6a and 6b of the stopper 6, and the screw insertion recess 6d has a head 15 of the set screw 14 or a nut screwed with the set screw 14, but the same head. 15 or the nut is formed to have a non-rotatable width, and the screw insertion recess 6 is formed with a screw insertion hole 6c penetrating to the outside of the recess 6, so that as shown in FIG. 15
Is set in the screw insertion recess 6d of the stopper 6, the head 15 of the set screw 14 in the screw insertion recess 6d does not rotate even when the nut is tightened, so the head 15 must be fixed with a tool such as a spanner. In addition, the set screw 14 does not rotate idly, and the work of tightening the nut screwed into the set screw 14 becomes easy.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an essential part showing an embodiment of a coupling device of the present invention, FIG. 2 is a plan view of a retaining portion of a receiving frame, and FIG. 3 is a perspective view of the vicinity of a storage portion of the present invention. FIG. 4 is a plan view of the vicinity of the storage portion of FIG. 3, FIG. 5 is a perspective view of the storage portion of the present invention, and FIG. 6 is a sectional view taken along line XX of FIG.
The figure is an explanatory view on the way of accommodating the connector in the accommodating portion, and FIG. 8 (a) is a vertical cross-sectional explanatory view showing the condition in which the connector is accommodated in the accommodating portion,
FIG. 9B is a perspective view showing an example of a stopper according to the present invention, FIG. 9 is an explanatory view showing how the connector supporting portion is stored in the storage portion, and FIG. 10 is storing the stopper in the receiving portion. Along the way, FIGS. 11 to 13 are explanatory views of the manhole cover connecting device previously developed by the applicant. A: Manhole cover H: Receiving frame J: Retaining part N: Rear surface of cover 1 ... Arm 2 ... Support part 3 ... Locking part 4 ... Connector 5 ... Storage part 6 ... Stopper 7 …… Insertion hole 9 …… Receiving part 10 …… One protruding part 11 …… Other protruding part 20 …… Lid back 21 …… Set part 22 …… Surrounding frame 23 …… Sidewall 24 …… Sidewall

Claims (1)

[Scope of utility model registration request] 1. A retaining portion J protruding inward from a receiving frame H into which a lid A of a manhole is fitted, and one end of an arm 1 inserted into the retaining portion J, which is supported so as to project to both sides thereof. A connector 4 formed with a portion 2 and a locking portion 3 formed at the other end so as to project to both sides, and a support portion 2
The storage part 5 formed on the back surface N of the lid A of the manhole so that the storage part 5 can be stored, and one of the projections 11 of the support part 2 of the receiving part 9 of the storage part 5 which is arranged to be stored in the receiving part 9. And a stopper 6 which is fixed near the rear of the receiving direction and restricts the support part 2 from coming off from the receiving part 9. The storing part 5 is elongated from the outer peripheral side of the lid A toward the center side. And the length in the longitudinal direction thereof is longer than the length of the supporting portion 2 and the width thereof is shorter than the length of the supporting portion 2 and the setting portion 21 is formed in which the side opposite to the back surface N of the lid A is opened to the outside. Surrounding frame 22 around
Is formed, and the receiving portion 9 is formed in one side wall 23 of the peripheral frame 22 so that the receiving portion 9 can accommodate the stopper 6 and one protruding portion 11 of the support portion 2. The side wall 23 is formed so as to be elongated along the set portion 21 and open to the set portion 21, and the side wall 23 has a stop hole 13 penetrating to the outside thereof. The other side wall of the peripheral frame 22 facing the peripheral wall 23. A protruding portion insertion hole 7 into which the other protruding portion 10 of the support portion 2 can be inserted is formed in the 24 so as to open to the setting portion 21,
The stopper 6 is formed in such a size that it can be housed in the receiving portion 9, and the stopper 6 has two protrusions 6a and 6b and a screw insertion recess 6d between the protrusions 6a and 6b. The screw insertion recess 6d is formed to have a width such that the head 15 of the setscrew 14 or the nut screwed with the setscrew 14 can be inserted but the head 15 or the nut cannot rotate. A connecting device for a manhole lid, characterized in that a screw insertion hole (6c) penetrating to the outside is formed.